Machine for sewing snap fasteners



A. E. LINDNER Jan.l 8 1924,

MACHINE FR SEWINGSNAP FASTENERS Filed Nov. 20, 1919 4 Sheets-Sheet 1Jan. s, 1924. 1,480,404

- A. E. LINDNER MACHINE FOR SEWING lSNAP FASTENERS Filed Nov. 20, 1919 4Sheets-She'e1'.4 2v

ar WW ATTDHN EY Jan;8,1924.

L48Q404 A.E.UNDNER MACHINE. FOR SEWING SNAP FASTENERS f Filed Nqv. 20,1919 4 sheetssheet s 1N VEN TOR 4f i g,- E ff? aber A TT ORNEY Jan. s,1924. 1,480,404

A. E. LINDNER A MACHINE AFOR SEWING SNAP FASTENERS Filed Nov. 20. 1919 4Sheets-Sheet 4 INVENTGR. @fvr E. [15m/rm ATTORNEY.

Patented Jan. 8, 1924,

muren,l STATES 1,480,494 PATENT office.,

ARTHUR E. LINDNER,

Y or BROOKLYN, NEW YORK, AssIeNOR rro THE L. AND n. SPECIALMAOHINEOQINC., or NEW YORK, N. Y., A

CORPORATION or NEW YORK.

MACHINE FOB, SEWING SNAP FASTENERS.

Application led November 20, 1919'. Serial 190.339,393.

To all whom it may concern.'

Be it known that I, ARTHUR E. LINDNER, a citizen of Germany, and aresidentl of the borough of Brooklyn, county of Kings, city and State ofNew York, have invented certain new and useful Improvements in Machinesfor Sewing Snap Fasteners, of which the following is a specification;The present invention relates to improve- 19 mentsin machines andmethods for sewing snap fasteners, and hasv for an lobject to providel amachine of this character, by means Of which snap vfasteners may besewed in a more secure and accurate'manuer than heretofore, and moreparticularly I`propose to provide a machine which will lproduce stitchesextending between the eyelets of the fastener, g and the periphery, tothe end that the same 2Q will be more securely fastened, and will layflatter on the material and will furthermore be less subject to twistingstrains than is the case when suchfasteners are only secured by.stitches extending between the eyelets.

A further object is to provide -a machine of simple and yreliableconstruction, and which may. be operated with facility, and a stillfurther object isto providea machine capable of adjustment toaccommodate 'snap fasteners of different dimensions.

f With these `and other objects ,in view, an embodiment of myinvention-isL shown in the accompanying drawings, and this embodimentwill be hereinafter more fully described with reference thereto, and theinvention will be finally pointed out in the claims. i

In the accompanying drawings, Fig. 1 is a plan view of the presentembodiment of W my invention with a portion of the machine head brokenaway.

Fig. 2 is a side elevation. Fig. 3 is an end view.v Fig. 4 is anenlarged view along the line 4--4 of Fig. 1.

Fi 5 is an enlarged detailplan view of the end of the fastenersupporting arm.

Fig. 6 is an end view thereof. Fig. l7 is a diagrammatic plan view of asnap fastener and showing the successive ositions at ywhich ythe needleis Operated relatively thereto. l l Fig. 8 isapla-n view of a snapfastener 'ent embodiment 'of my invention. f l

andalso between the eyelets vertical sectionalr sewed to the materialyaccording to the pres- N 1' transverse pin "a" fm'wardlyl extendingFigs. 9, 10, and 11`are diagrammatic views f of the three cooperatingcams employedin the machine vfor producing the movement of the snapfastener supporting arm.

Similar reference characters indicate vcorresponding parts-throughoutthe several igures of the drawings. i Referring to the drawings, theembodiment of myinvention disclosed therein .comprises a base plate 10,provided with a hea 11 lof the usual type in sewing machines, having ahorizontal drive shaft- 12 extending rearwardly, and provided with apulley 12'L ada-pted'to be engaged by a suitable belt, and providedinits forward end with a reciproeating needle bar 13, carrying aneedle11, adapted to reciprocate through a needle hole 15 in the throatplate 16, and cooperate with a looper (not shown) beneath `the base-to.form a stitch. The above referred to parts are old in sewing machines,yand may be of any usual and desirable type.` Adjacent the uprightportion of thehead rising from the base plate, -and extending forwardlytherefrom, there is provided in the base plate a slot 17 in which ismounted a slide piece 18, fixed by screws 18a upon the end portion 19 ofa slide` bar 20,y extending from the-said portion 19, which is disposedat right angles to the slide piece 18, diagonally across rearwarddirection, where it is provided with another end portion 21 at rightangles to the portion 19, and slidably7 supported in a guide bracket 22having a laterally extending iange- 23 extending beneath and secured tothe under side' of the base plate by bolts 24, which also in addition toother bolts 25 secure to the vrear end of the base plate 10 a rearwardlyprojecting supporting` plate 26, the portion 21 of the bar 20 beingguided between theside of thisplate 26 and aflange 27 on the bracket 22.The .slide piece 18 and the bar 2O are adapted to-have equal sliding.movement longitudinally of the bed plate. A i

Upon the upper surface of the portion 19 of vthe bar 20, thereis'rigidly secured a strip 28 by means of screws 29, and upon which isswivelly secured by`means lof a button stud 30,"`a' U shaped supportingmember 31,

'the button stud 30 passing through the base thereof, whilel between-therupstanding -side portions 'there ispivotally -mounted upon a the bedplate in a block member 33 guided at its forward portion by angle pieces34 and 35 secured to the front face of the member 31 by screws 36, thesescrews also securing in place a laterally extending ear 37, havingupwardly extending lugs 38 and 39 interposed between the angle piecesand the faces of the member 31, the under surface of the ear beingsufficiently above the base 10 to secure the strip 28 upon turningmovement of the member 3l.

To the upper surface of the block member 33 there is secured'the end ofa forwardly extending elongatedy arm 40, retaining screws 41 and 42engaging a lslot 43 in said arm to permit of its longitudinaladpistment. At its forward portion the arm is bent at an inclinationdownwardly as at 44 to a flat engaging end portion 45. An

`elongated U shaped spring/46 having its transverse portion engagingacross the upper surface of the arm 40 and its ends secured in theupright portions of the supporting member 31 by screws 47, bears downupon the arm 40 and yieldingly engages the end portion with'the throatplate, or more properly the material disposed upon the throat plate. andtoy which the snap fastener is to be secured. l

The arm 40 may be raised to lift the end 45 from the t-hroat plate bypressure upon a. pedal lever 48, preferably hinged to the floor. throughthe intermediary of alever 49 pivotally mounted at 5()1 upon the side ofthe head 11, the end of the upper arm'of which is provided with anLshaped rod 51, connected by a chain 52 to a loop 53 secured to the saidarm 40, while the other arm extending through a slot 54 in the base 10is connected by a chain 55 extending over a roller 56 to a pedal i Theswivel mounting of the member 31 supporting the arm 40 upon thelongitudinally slidable parts 2O and 18, permits of the end of the armhaving universal movemeut upon the throat plate to assume any desiredposition, and the mechanism for producing lsuch movement will bepresently more fully described.v

The end 45 of the arm 40 is provided with a rectangular cut-out portion-57. the front Yside being open, the side walls havingy grooves 58therein tol receive a circular snap fastener A, provided in the presentinstance with four equally spaced radially disposed eyelets B, C, D, andE, the sewing thread F` adapted to extend between the eyelets and alsofrom the eyelets over the periphery` as shown in Fig. 8, being looped atthe under side of the material by a holding thread as is usual inmachine sewing. Recesses 59 and 60 are provided in the corners of thecut-out 57 in radial alignment with the eyelets B and Eto provide afree-way for the needle, the peripheral portions of the fastener inradial alignment with 4the eyelets C' and D being unenclosed.

The fastener, afterbeing inserted in the end of the arm, is yieldinglyheld in place by means of a plunger pin 61, disposed in a passage 62 inthe forward end of the arm at one side of the cut-out 57, and projectinginto the groove 58 into engagement with the periphery of the fastenerforwardly of its transverse center line, the outer end of the pin beingsupported, upon the end of a fiat spring 63 pinned to the arm 40 as at64, and adapted to have lateral movement. A Hat spring 65 adapted tohave vertical movement is also pinned to the arm 40 at 66, and carriesan angular bevelled` cam piece 67, the pointof which is adapted to passat the inner side of the spring 63 upon depression of the spring 65, thebevelled surface of the cam. piece causing ,thef lateral outwardmovement of the spring 63, and disengagement of the pin 61 from thefastener. This action is brought about during raising of the arm bydepression of thev pedal lever 48 by engagement of the spring 65 with astop piece 68 mounted upon `the head l0, and having a laterally bentportion 69 in the path of the said spring. Y

According to the present embodiment of.' my invention, the end of thearm carrying the fastener assumes eight different positions relativelyto the line rof. movement `of the needle, that is interiorly of each ofthe four eyelets, and exteriorly of them radially i outwardly of theperiphery, and has six? teendift'erent movements during a complete cycleof operation, that is during the sewing of one fastener.l

These movements are illustrated in Fig. 7, the first stitch being withinthe eyelet B, the second within the eyelet E and the third stitch withinthe eyelet B again. These three preliminary stitches securely hold thefastener to the material for the subsequent operations. The fourthstitch is exteriorly of the eyelet B. the fifth stitch interiorly of theeyelet B, the sixth stitch interiorly of the eyelet C, and the seventhstitch exteriorly thereof, and the eighth stitch interiorly; the ninthstitch interiorly of the eyelet D, the tenth stitch exteriorly thereof,`the eleventh stitch interiorly; the twelfth stitch interiorly of theeyelet the thirteenth stitch exteriorly thereof, and the fourteenth,fifteenth, andsixteenth stitches interiorly thereof. These last threestitches within the eyelet E form a knot lile structure at the underside of the material, which secures the thread against unraveling, Thethread is then cut, preferably by automatic means, such as shown kforinstance in my U. Sr Patent No. 1,193,906, dated August y8, 1916, forApparatus for cutting thread in sewing machines. After the sixteenthstitch the arm k40 moves so that `it is ina and is provided at 'its endWithrolglerl,

engaging the cam face of a swingingfcam lever 72, pivotally "mountedat-73 lfon-the end portion 21 of the slide vbar20,.ithe

roller being held in engagement with the Said cam face by means of acoilsprinfg 74, connecting the under side 'of the 4ar'm 70-A at 75 tothe under side of the camr'lever 72 at 76.

The cam face of the cam lever 'comprises four parts, 77, 78, 79, and 80,in stepped relation in the `order designated by thel'numbers 1, 2, 3 and4 as shown and connected by'inclined surfaces 4 as at81and e'aeh.provided with 'slotted -tonguesl'82 engaging -Vrecesses 83 in theAflared end of thecam lever, and adjustable to V'regnlate therelative-rises of the camparts byd means of set sorewsz84.

At its rear jend the 'cam lever is )provided with a slot 85 engaged byvarollerj-86pro vided on theend of atransverselyslidable bar 87 mounted atthe under side'of the-'support 26 in a slide lchannel E88,'being held-inplace at its underside by across piece 89, secured by `screws 90. Adepending `arm 91 is provided at'theinner end -of thebar 87 upon lWhichis mounted 'a roller 92 engaging the peripheral'c'am 'surface of a 'cam93, mounted upon a cam shaft 94, journalled in dependingbearing'bra'ckets 9.5 `andl96 at the under side of the support 26, aslot 97; being provided in the saidsupportbetween the brackets 95and'f9`6, through which .the cam rotates. f

rThe cam shaft is driven fromth'e vdrive shaft 12 by a train of reducinggears 98, 99, 100 and 101, at 4'a ratio of 1 to 16,'thesmall and largegears -98 and 101 being respec-` tively mounted on the drive shaft and'the cam shaft, While the large and ysmall gears 99 and 100 are mountedon a 'stud 'shaft 102 journalled in a bearing bracket 1103, pro# videdon the support'26 and braced a its outer end by a ,bar 104 connected to'the re-V spective ends of tlie'shafts 12 and 102.' The roller 92 isyieldably held in engagement with the cam 93 by means of a coil spring105 extending between the stud 106 at thev under Side' er the bar 87 ana.the @lossA piece 89. j

The swinging of the cam lever 72 through the action of the cam 93 causesengagement of the respective f'zam"'poitionsy 77, 78,179, and 80, withthe roller 71, thereby swing; ing the armV 70, and producing thetransverse'inovement ofthe arm 210, 'the slot een# neetionv 85betweenthecam lever '7.2 and the bar 87 permitting longitudinal move:

ment simultaneously through the mounting oflthecamde'v'er172ionthe slidebar 20 With-` :out 'dstnrbingfthis relation.

L1A.''transverselydisposed.lever 107 is pivijotedat 1.08'fto1thebaseplate 10 and extends f. `direneath the l ear f, 37 A.of "fthe supportingmem- ;berf31 being. vprovided With a lslot-:109 en-` Vgagin'gran'upstanding pin or stud 110 on the-slidepiece 18,;L and is adapted 'byitssW-i-nging movement -to lcause longitudinal4 .movement of ,the saidslide piece, the bar 20, fthesupportingimember 31, and the parts`'carriedf thereby, i. e. the cam lever 72, the

`armv70, and thesnap fastener supporting arm 40.

At-the outer endof the lever 107, there is .swivellyfmounted, at 111aturn block 112,

z having .-1 an .upstanding ear 113 thereon, to -Whichdspivotallyfconnected one endof a rod .#114, :its other end beingpivotally.cony

nected vto .an -upstanding arm 115 of, an arcuate plate .7116, secured eto cylindrical p sleeve Y 117,-, mounted on, the .transversely disposedshaft 1118 journalledat 4its endsin :bearing brackets 119 land 120`onthe sup-r port. :26. 5A rearwardly `projecting arm .121 is alsoprovided on the plate 116 bent-transversely as at 122 and'providedxatfits end -'withfdepending`.ears e123 -`rotatably supporting.sa v`roller 124 f wh-ieh Arieles :upon "the pevfri-pheralisurtace iofAa cam- 125 mounted' on ,the camshaft "9.4:, and adapted 'to swing the`-lever i107 through the intermediary of the `'arms :121van'd lltandtherod 114. -n

The cam 125 comprises :sixteen separate-r` portionsmountedin the annularchan .nel .O'f .an .annular supporting =member 127, .and 'individuallyVadjustable by means fof slots v'128 :therein engaged by f set screws129 to regulate f'the relative ipositions 'of the 'individual camsurfaces, to laccurately adrjust the swinging movement of the ylever.10.7, and thereby the :longitudinal "movement of :the atm 40;

coil spring A130 [extending between a `'stud pin "1311 ion the turn,block -1'12 and a *,pin 132 ont-he support 26 normally draws fthe levery107rearwardlyvand holds 'theroller 1241 in engagement With'the cam 125.A

'cutlout portion Y133 in the arm 70 accommo 'dates themovement of theturn'block .112.

The transverse movement .of the larm 40,

it Will be understood, is produced through `the cooperative `action ofthe cam surfaces 77, 78, 79, and 80, and the cam 93, While the:longitudinal movement of the said yarm islprioduced through the `actionof the cam 125; and adjustment ofl the `individual earn 'parts 77, 78,79, and 80, and thein'diy'vi'e'l'ual cam parts4 of the cam 125, boththetransverse and longitudinal movementl may be 'accurately adjusted tolproduce any vdesired tlirjov'v and thereby enable the sewing ofsnapa'stenersbf different sizes uponthe same machine. InfFigs. 9, 10, and11, I

have illustrated diagrammatically the three cams and have numbered thesixteen partsy of the cams 93 and '125 andthe four parts of the camlever 72 with the numbers l to `i6 to indicate the positions at whichthere is independent transverse movement, independent longitudinalmovement, andsiinultaneous transverse and longitudinal movement. Thus,at the positionsfl, 2, and' 3,

there is independent transverse movementv from the eyelet Btc the eyeletE and bach` to the eyelet B, while ini the position 4L there issimultaneous transverse and longitudinal movement from the eyelet kB tothe exterior peripheral portion of the fastener in radial alignment withthe eyelet B. From the position fi to the position 5 there issimultaneous transverse and longitudinal :movement baclr to the eyeletB, while from the position 5 to the position 6 there is inde-` pendentlongitudinal ymovement, etc.

I have illustrated and described a preferred and 'satisfactoryembodiment of my invention, butit is obvious that changes may be madetherein -ivithinthc spirit and scope thereof, as defined in theappended,`

tively to said needle, cam means for causing j said transverse movement,said cam means having individual cam parts separately ad-y justable toadjust the extent of said transverse movement, and cam means for causingi said longitudinal movement;

2. In a sewing machine of the character described, a stitch formingmechanism including a needle, a supporting member:

adapted to support an article to be sewed having eyelets, said memberadapted to have. longitudinal and transverse movement relatively to saidneedle, cam `means for causing said transverse movement, and cam meansrfor causing said longitudinal move- 4ment, said last mentioned cammeans having individual camparts separately adjustable to adjust theextent ot said longitudinal movement. f

In a sewing machine ot the character described, a stitch formingmechanism including a needle, a supporting member adapted to support anarticle to be served having eyelets, said member adapted toV havelongitudinal and transverse movement rela.-

tively to said needle, primary cam means for causing said'transversemovement having cam parts corresponding in number to the number oftransverse positions and 'sechereunder: ondary cam 'means adapted tocause the v movement of said primary cani means and having cam partscorresponding to the number ot trans-verse movements during the sewingof one article, and came means for caus- -ing said longitudinalmovement. 4. In a sewing machine of the character described, a stitchformingHmecha-nism including fa needle, a supporting member adapted tosupport an article-to be sewed ,having eyelets,-said member adapted tohave longitudinal.. andv transverse movement relatively'to said needle,primary camk means Jfor causing .said'transverse movement havingindividual cam parts separately adjustl able to adjust the extent ofsaid transverse movement and corresponding in number to the numberottransverse positions andy secondary cam means adapted to cause themovement of said primary cam means, and -haviiigcam parts correspondingto the numf ber ot transverse movements during the sewing of onearticle,and cam means for causingsaid longitudinal movement, said last mentionedcam -means having individual cani parts separately. adjustable to adjusttheY extent of said ,longitudinal movement.`

'5; In a sewing machine .of the character described, a-fstitchl formingmechanism including a needle, a supporting member providedwith anopening adapted to receive l and support' an article tofbe sewed havingeyelets, a pin in the plane of and adapted toproject into saidopeningtoengage said article to retain the same therein aga-inst removaland turning movement, and lspring means adapted to yieldably projectsaid pin into said opening, and permit its withdrawal.

ktSJIn ai sewing machine of the character described, a throat plate, astitch forming mechanism r`includinga needle, a supporting` memberprovided with an opening adaptedto receive and support an article tobe'sewed having eyelets, a pivotal suppoit at one end of said supportingmember, spring means adapted to yieldably engage its' other end withsaid throat late, means for raising said end from said t roat plate, alaterally movable pin adapted to project into .said opening to engagesaid article to retain the same therein against removal and turningmovement, spring means adapted to lyieldably project said pin into saidopening, and means adapted to withdrawsaid pin from. said opening uponthe raising of said supporting member, to permit the removal of, saidarticle and the insertion of anotherone, said pin adapted to lbeprojected into said opening upon the lowering of said supporting member.

In testimony that I claim the foregoing` as my invention, I have signedmy name ARTHUR E. ifmnivnnr

